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Thu 9 Apr, 2015 09:54 am
Explain how you would prove if four given points are coplanar. Use your method to determine if
A (3, 1, 4), B (7, -2, 9), C (0, 8, 2) and D (8, 2, 12) are coplanar.
@gurlal123,
They are coplanar if the vectors AB, AC and AD are coplanar.